/* 初始化样式 */

body {
    margin: 0;
}

div {
    box-sizing: border-box;
}

h1,
h2,
h3,
h4,
h5,
h6,
p {
    margin: 0;
    font-weight: normal;
}

ul {
    padding: 0;
    margin: 0;
    list-style: none;
}

img {
    height: 100%;
}

a {
    text-decoration: none;
}

.list-hd {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 1;
    width: 100%;
    height: 2.75rem;
    background-color: orange;
    color: #fff;
    line-height: 2.75rem;
    text-align: center;
}

.container {
    margin-top: 2.75rem;
}